#! /usr/bin/env python3
# https://pythonguides.com/python-plot-multiple-lines/
# Importing packages
import matplotlib.pyplot as plt

# Define data values
x = [7, 14, 21, 28, 35, 42, 49]
y = [5, 12, 19, 21, 31, 27, 35]
z = [3, 5, 11, 20, 15, 29, 31]

# Plot a simple line chart
plt.plot(x, y, 'g', label='Line y')

# Plot another line on the same chart/graph
plt.plot(x, z, 'r', label='Line z')

plt.legend()
plt.show()